Adjustable reamer



June 19, 1934. 1.. c. VANDERLIP 1,963,767

ADJUSTABLE REAMER Original Filed March 24, 1930 Patented June 19, 1934PATENT, OFFICE ADJUSTABLE REAMER Louis C. Vanderlip, Elkhart, Ind.

Application March 24, 1930, Serial No. 488,381

\ Renewed May 8, 1934.

Claims; 01. 77-755) This invention relates to improvements in rotarycutting tools, andparticularly to adjustable reamers.

The principal object of my invention is to provide a rotary cutting toolof the character described which is simple in construction and which isprovided with improved means for clamping the cutting blades of the toolin adjusted position. Another object of the invention is to provide 0 anadjustable reamer, or the like, with improved means for clamping thecutting blades upon their seats and also laterally against the bladeslot wall to prevent chatter of the blades when in use.

7 A third object of the invention is to provide an adjustable reamer, orthe like, with compound cam means engaging the ends of the blades toclamp the cutting blades laterally against the blade slot wall.

Other objects of the invention are mentioned herein or suggested by thedescription and draw- An embodiment of my invention is illustrated inthe accompanying drawing, wherein Figure 1 is a longitudinal axialsection of the assembled tool;

Fig. 2 is a fragmental longitudinal plan view;

Fig. 3 is a section taken on line 3-3 of Fig. 1;

Fig. 4 is a section taken on line 14 of Fig. 1;

Fig. 5 is a perspective of one of the blade clamping collars;

Fig. 6 is a perspective of a fragment of the body of the reamer;

Fig. 7 is a perspective of one of the cutting blades.

"3' Similar numerals of reference indicate like parts throughout theseveral views on the drawing.

Referring to the details of the drawing the numeral 1 indicates thereamer body, or blade holder, which may be cylindrical in cross-section,and which may be provided with a shank section 2. The outer face of thebody 1 is provided with a series of longitudinally disposed blade slots3, the bottoms 4 whereof incline somewhat in relation to the axis of theholder 1, and said slot bottoms may be somewhat inclined transverselythereof, that is to say, at an acute angle relatively to the radius ofthe body 1.

Numeral 5 indicates a series of cutting blades 1 arranged in the slots3, the inner edge or bottom 6 whereof is formed at an angle tocorrespond and cooperate with that of the slot bottom 4, bothlongitudinally and transversely thereof, and the outer edge '7 of saidblade is beveled to form a 5 utting edge thereon. The opposite end ofeach blade is provided with an inclined-face 8 which is laterallybeveled to provide a'compound cam face which, when acted upon by acoacting compound earn, as hereinafter described, will clamp the bladeboth inwardly and laterally.

Mounted upon the body 1 at opposite ends of the blades 5 are a pair ofclamping collars 9 and 10 which may be splined to the body 1 by keys 11and 12 to effect sliding movement upon the cylindrical body sections 13and 14, respectively, of which spline keys there may be a pair inopposition for each of said clamping collars. Both collars 9 and 10 maybe alike in construction, and each may be provided with a plurality ofcam prongs 15, corresponding with the number of cut ting blades, each ofwhich cam prongs is provided with an undercut cam face 15 which islaterally beveled to correspond with the cam face 8 on the blades toprovide a compound undercut cam which overlies the inclined compound camface 8 on the blades.

The clamping collars 9 and 10 may be actuated longitudinally of theholder 1 by the collars 17 and 18, respectively, which are screwthreaded upon reduced portions 19 and 20, respectively, of the holder 1,said collars 17 and 18 functioning also as abutments to preventlongitudinal re-' tractive movement of the collars 9 and 10, when thebeveled face 16 of the cam prongs 15 coact I with and overlie thebeveled blade ends 8. S5

The manner of effecting longitudinal adjustment of the cutting blades 5by rotary or sliding collars, in a device of this character, is wellknown, as well as obvious, from the disclosure and the foregoingdescription, and when thus adjusted and the clamping collars 9 and 10,and cam prongs 15, are rigidly clamped against the blade ends 8 byactuation of the collars. 1'7 and 18, it will be evident that eachcutting blade will be rigidly clamped laterally against a wall of theblade slot as well as inwardly against the inclined slot bottom 4,thereby effectually preventing blade chatter when the tool is in use.

I claim:

l. A cutting tool of the character described comprising a body providedwith a longitudinal slot having a bottom inclined to the axis or thebody, a cutting blade'adjustably mounted in the slot having its bottomshaped to correspond to the 105 body bottom, and the end of the bladebeveled in a plane at an acute angle to both its side and bottom, andcam means engaging the blade end and operable to force the bladelaterally and. inwardly to clamp it in the body slot.

2. A cutting tool of the character described comprising a body providedwith a longitudinal slot having a bottom inclined to the axis of thebody, a cutting blade adjustably mounted in the slot having its bottomshaped to correspond to the slot bottom, and the end of the bladebeveled in a plane at an acute angle to both its side and bottom, andcam means complemental in shape to the blade end and engaging'th'elatter and operable to force the blade laterally and inwardly to clampit in the body slot.

3. A cutting tool of the character describe comprising a body providedwith a longitudinal comprising a body provided with a longitudinal slot,a cutting blade adjustably mounted in said slot, said blade having eachend face thereof inclined both longitudinally from the top to the bottomthereof and from one side toward the other in converging planes, andmeans engaging said end faces to force the blade against the bottom and,one side only of said slot.

5. A cutting tool of the'character described comprising abody'provide'dwith a longitudinal slot; a cutting blade adjustably mounted in saidslot, said blade having each end face thereof inclined bothlongitudinally from the top to the bottom thereof and from one sidetoward the other in converging planes, and means engaging saidendfa'cestoforce the blade against the bottom and one side only of said slot,said means comprising collars mounted for sliding adjust-' ment adjacenteach end of said blade slot and carrying opposed cam prongs having endscomem n e l p t g mbled? nds:

LOUIS C. VANDEBLIiI lf;

